提出了一种基于交互、 面向服务的P2P网络体系结构框 架模型ISPNA，同时结合P2P网络 松耦合、自组织、可缩放等特点， 对P2P网络技术中增强其可用性需 要解决的关键问题进行分析。 从P2P网络体系结构的研究角度出发， 将增强P2P网络可用性所需要考虑的 多方面因素放置在P2P网络的不同 层次予以解决，有利于从宏观上 把握需要解决的问题。

An interactive service- oriented P2P networks architecture (ISPNA) is proposed in this paper.  Based on the further analysis on the service demand of distributed P2P applications,  and considering the characteristics of P2P networks such as loose-coupled,  self-organizing,  and scalability,  the key availability enhancing issues of P2P networks are resolved by several different layers in ISPNA,  of which mutual relations are to analyzed.  From the architecture point of view,  to synthetically take into account the omnifarious factors that affect the availability of structure P2P networks and to analyze the causes of their formation should be helpful to put the questions in right perspective.